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is that possible i'm using this substring to determine age from id?

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Join Date: Oct 2009

Posts: 59

Reputation: samsons17 is an unknown quantity at this point

Solved Threads: 1

samsons17

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Junior Poster in Training

is that possible i'm using this substring to determine age from id?

Nov 3rd, 2009

i'm trying to determine the age of the people by entering their id card number..i'm trying to do this without having the database..
is this code possible??because i got error when try to run it..
if this possible,could you tell me the correct way to do this?

Thanks...

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#include <iostream>
#include <string>
using namespace std;
 
int main()
{
int idnum,age,yearbirth;
 
cout << "enter id number: ";
cin >> idnum;
 
yearbirth=idnum.subint (0,2);
 
age=2009-yearbirth
 
cout << age;
 
}
#include <iostream>
#include <string>
using namespace std;

int main()
{
int idnum,age,yearbirth;

cout << "enter id number: ";
cin >> idnum;

yearbirth=idnum.subint (0,2);

age=2009-yearbirth

cout << age;

}

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Join Date: Jan 2008

Posts: 3,829

Reputation: VernonDozier has a reputation beyond repute

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VernonDozier VernonDozier is offline

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Senior Poster

Nov 3rd, 2009

I think you need to give an example. What's idnum? How does one determine yearbirth from idnum? idnum is an int. There's no "int" class, so the dot operator won't work.

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idnum.subint (0,2);

What are you trying to do here?

Last edited by VernonDozier; Nov 3rd, 2009 at 12:37 am.

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Join Date: Sep 2009

Posts: 455

Reputation: jonsca is an unknown quantity at this point

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jonsca

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Posting Pro in Training

Nov 3rd, 2009

There's no such thing as subint to my knowledge.
Take in the ID as a string, do a substr(0,2), convert that truncated string to an integer (using atoi). There's a slight flaw in your ID scheme though since if the digits are 00-09 the person could be 100 or just born. You need to do your subtraction by adding to your year value so it gives the right age.